Answer:
B. gas state at room temperature
Explanation:
Help me Look at the pictures!!!! Past due!
Make an explanation of how my hypothesis is not supported.
Answer:
Explanation:
the temperture of the warmer water will make it have more space and have less density in the water.
PLS HELP ON A TIMER!
if the pressure exerted by a sample of carbon dioxide at 25° C in a volume of 0.44L is 3.81 atm, what is the mass of the carbon dioxide?
A. .0685
B. 1.65
C. 3.02
D. 14.4
Answer:
3.02
Explanation:
Which model illustrates a compound A, b, c, d,
Answer: C
Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)
How should the following reaction be classified?
CaCo3 → CaO + CO2
A. combustion
B. decomposition
C. single displacement
D. synthesis
E. double displacement
The graph shows the speed of a car
traveling east over a 12 second
period. Based on the information in
the graph, it can be concluded that
in the first 6 seconds, the car is -
A changing its direction.
B experiencing less and less
friction.
moving at a constant speed
D climbing a steep incline.
Answer:
Letter B.
Explanation:
Changing its direction and climbing a steep incline can't be proven only by the graph info. You can see that it's speed isn't constant in the graph.
We have letter B left.
put have has or had where appropriate in the following sentence, Exam malpractices_______become a serious issue
Answer:
has
Explanation:
has
Answer:
has
Explanation:
what is a chromatogram?
please help me out
Thank you
Answer:
a visible record (such as a series of colored bands, or a graph) showing the result of separation of the components of a mixture by chromatography.
Explanation:
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which is fixed a material called the stationary phase.
Answer:
Chromatography is a technique used to separate mixture of chemical substances into its individual compounds.
Explanation:
What is the solar process that results in the production of energy?
nuclear fission
nuclear fusion
convection
radiation
Answer:
nuclear fusion
Explanation:
mark me brainliest please.
Answer:
B.) Nuclear fusion
Explanation:
how does electromagnetic energy travel?
Electromagnetic radiation is a form of energy that propagates as both electrical and magnetic waves traveling in packets of energy called photons. There is a spectrum of electromagnetic radiation with variable wavelengths and frequency, which in turn imparts different characteristics.
This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space. ...
can someone answer dis:
1) The atomic number of an element shows how many ___________ there are in its atoms.
thankss
I think that the answer is protons
What volume of O2 is required to react with C S2(1) to
produce 4.0L of CO2(g)?
Answer:
12 L of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
CS₂ + 3O₂ —> CO₂ + 2SO₂
From the balanced equation above,
3 L of O₂ reacted to produce 1 L CO₂.
Finally, we shall determine the volume of O₂ needed to produce 4 L of CO₂. This can be obtained as follow:
From the balanced equation above,
3 L of O₂ reacted to produce 1 L CO₂.
Therefore, xL of O₂ will react to produce 1 L CO₂ i.e
xL of O₂ = 3 × 4
xL of O₂ = 12 L
Thus, 12 L of O₂ is needed for the reaction.
Indicate whether the formation of each ion involved a loss or gain of electrons, and state the number of electrons that were lost
Answer:
The sign of the charge on an ion indicates the number of electrons gained or lost by the neutral atom. An ion with +1, +2 or +3 charge, has lost 1, 2 or 3 electrons respectively. An ion with a -1, -2, or -3 charge has gained 1, 2or 3 electrons respectively.
Note: The question did not state the ions in question.
Explanation:
Ions are formed when neutral atoms gain or lose electrons. There are two types of ions; cations and anions.
Cations are positively-charged ions which are formed when neutral atoms lose electrons. Cations are formed by metallic elements as they have a greater tendency to give up their electrons in order to form ions, i.e. they are electropositive elements. Examples of cations include Na+, Ca²+, Al³+, Fe³+, etc.
Anions are negatively-charged ions which are formed when neutral atoms gain electrons. Anions are formed by non-metallic elements as they have a greater tendency to accept electrons in order to form ions, i.e. they are electronegative elements. Examples of anions include; Cl-, O²-, N³-, etc.
The sign of the charge on an ion indicates the number of electrons gained or lost by the neutral atom. An ion with +1, +2 or +3 charge, has lost 1, 2 or 3 electrons respectively. An ion with a -1, -2, or -3 charge has gained 1, 2or 3 electrons respectively.
1. Observa y completa los neutrones se encuentran ----------------- A. Girando alrededor d las orbitas B. Fuera del nucleo C. En las orbitas del nucleo D. Dentro del nucleo
Answer:
Los neutrones se encuentran dentro del núcleo.
Explanation:
Un átomo es la parte más pequeña de materia que puede combinarse químicamente con otro y mantiene todas las propiedades de un elemento.
Los átomos se combinan para formar moléculas que luego interactúan para formar sólidos, líquidos y gases.
Su estructura está compuesta por diferentes combinaciones de tres sub-partículas: los neutrones, los protones y los electrones. A su vez posee dos regiones diferentes: el núcleo, donde están los protones y los neutrones, y la nube u orbitales electrónicos, donde se encuentran los electrones.
Entonces, los neutrones se encuentran dentro del núcleo.
How will an ecysosyem's population be impacted if humans clear out all of the trees?
NO LINKS YOU WILL GET REPORTED!!!
WORD ANSWERS ONLY
Answer:
Without trees formerly forested areas would become drier and more prone to extreme droughts. When and if rain did come flooding would be disastrous and massive erosion would impact oceans smothering coral reefs and other marine habitats
Explanation:
hope this helped (:
A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L , what is the new pressure?
Answer:
[tex]\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}[/tex]
Explanation:
In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
Now we can substitute any known values into the formula.
Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.
[tex]25.0 \ L * 2.05 \ atm = P_2V_2[/tex]
The volume is decreased to 14.5 liters, but the pressure is unknown.
[tex]25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L[/tex]
Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}[/tex]
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2[/tex]
The units of liters cancel.
[tex]\frac {25.0 * 2.05 \ atm }{14.5 }=P_2[/tex]
[tex]\frac {50.25\ atm }{14.5 }=P_2[/tex]
[tex]3.53448276 \ atm = P_2[/tex]
The original values of volume and pressure have 3 significant figures, so our answer must have the same.
For the number we found, that is the hundredth place.
3.53448276The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.
[tex]3.53 \ atm \approx P_2[/tex]
The new pressure is approximately 3.53 atmospheres.
Soda water is water that has bubbles of carbon dioxide in it,
soda water is…
a) mixture
b) a molecule
c) an element
d) a compound
Answer:
it is a mixture.
Explanation:
Soda water is a solution of water (H2O) and carbon dioxide (CO2). It has a variable composition and there are not chemical bonds involved.
There is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
The correct option for the given question about Mixtures is Option A) Mixture
Why Soda water is a mixture?A mixture of water (H2O) and carbon dioxide is soda water (CO2). There are no chemical bonds present, and it has a variable composition.
It is also called carbonated water as CO2 is first compressed and then get dissolved in it.
The chemical interaction between CO2 and H2O results in the production of H2CO3, a carbonic acid. This is what gives soda water a little acidity.
If the water is somewhat cold in temperature, gas can dissolve in it. The less soluble gas is, the hotter the water is. Additionally, more gas may dissolve in water at greater pressures for the water and gas combination.
Thus we can conclude that Soda water is a homogenous mixture of water and carbon dioxide.
Learn more about mixtures here:
https://brainly.com/question/1917079
#SPJ2
PLS HELP THIS IS SCIENCE !!
IGNORE THE QUESTIONS I ACCIDENTLY PRESSED ON
Answer:
10.)14
Explanation:
MARK AS BRAINLEST!!
Answer:
where is the answer??
Please do not just take the points without answering the question.
How much energy must be absorbed by 45.0g of water to increase its temperature from 83 0°C to 303.0°C?
Answer: There will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from [tex]83.0^{o}C[/tex] to [tex]303.0^{o}C[/tex].
Explanation:
Given: Mass = 45.0 g
Initial temperature = [tex]83.0^{o}C[/tex]
Final temperature = [tex]303.0^{o}C[/tex]
Formula used to calculate heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat = [tex]4.18 J/g^{o}C[/tex] (here, for water)
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 45.0 g \times 4.18 J/g^{o}C \times (303.0 - 83.0)^{o}C\\= 41382 J[/tex]
Thus, we can conclude that there will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from [tex]83.0^{o}C[/tex] to [tex]303.0^{o}C[/tex].
am i right??? this is graded and no links plz!!!!
Answer:
Yes! You are correct
Explanation:
The higher the frequency of light, the higher its energy. .
please help!!!!
A certain reaction is endothermic in the forward direction. The reaction has less moles of gas on the product side. Which of the following stresses would increase the yield of the product (shift right)?
a) increase the temperature
b) decrease the temperature
c) increase the volume
d) decrease the reaction concentration
Answer:
The correct answer is A, "increase the temperature."
Explanation:
By increasing the temperature, it would shift the reaction to the right. All of the other options would either cause the reaction to shift left, or are simply invalid. I hope this helps!
Increase in temperature will increase the yield of the product and cause a shift to the right.
What is an Endothermic reaction?This is the type of reaction in which reactants absorb heat energy from the surroundings to form products.
This depicts that an increase in temperature will increase the yield of products thereby making option A the most appropriate choice.
Read more about Endothermic reaction here https://brainly.com/question/1447631
What is the relative humidity if the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C ?
Answer:
39%
Explanation:
The Dry Bulb Temperature (also known as air temperature) is the ambient air temperature.
The Wet Bulb temperature is the temperature of adiabatic saturation.
The relative humidity is the amount of water vapor in the air. The relative humidity can be gotten from the dry bulb and wet bulb temperature. The difference between the wet bulb and dry bulb temperature as well as the dry bulb temperature is used to determine the relative humidity with the help of a Psychrometric Chart
Given that the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C. From the chart:
Relative humidity = 39%
Answer:
39% I believe is correct.
Are elements and compounds the same thing?
Answer:
no
Explanation:
a compound is a mixture of two or more elements while a element is by itself.
Answer:
no
Explanation:
elements are their purest form. compunds are a mix of mutiple elements.
Please help me with number 43
Answer:
The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes
Explanation:
Limitations definition
Answer:
a limiting rule or circumstance; a restriction.
Example:
Also knowing her limitations, she'd declined the invitation to join them
Vhat are some of the benefits and drawbacks of recycling?
Answer:
benefits: can help reduce waste in land fills, and promotes reusability (turned into different products)
drawbacks: can be much more expensive to salvage than to just throw it in a landfill, and most of the time products cannot be recycled effectively due to its material.
the chemical symbol of sodium is
Answer:
Na
Explanation:
ILL GIVE YOU BRAINLIEST!!!!Which of the following is an example of a description of climate? *
1 point
the relative humidity in Raleigh, NC
the current temperature in Knightdale, NC
the amount of rainfall in last week's storms added together
the average temperature and precipitation in Raleigh, NC over the past 30 years
Answer:
The relative humidity in Raleigh, NC
You can search it up online. Search up what is climate change and it will give you "the weather conditions prevailing in an area in general or over a long period." (On bing)
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
2.15 mol of hydrogen sulfide, H2S
When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas write the balanved equation
Answer: When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
Explanation:
The word equation is given as maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas.
Now, in terms of chemical formulae this reaction equation will be as follows.
[tex]MnO_{2} + HCl \rightarrow H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Here, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 1Cl = 1Number of atoms on product side are as follows.
Mn = 1O = 1H = 2Cl = 4To balance this equation, multiply HCl by 4 on reactant side and multiply [tex]H_{2}O[/tex] by 2 on product side. Therefore, the equation can be rewritten as follows.
[tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex]
Hence, number of atoms on reactant side are as follows.
Mn = 1O = 2H = 4Cl = 4Number of atoms on product side are as follows.
Mn = 1O = 2H = 4Cl = 4Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.
Thus, we can conclude that when maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].
How is the AHfusion used to calculate the energy needed to melt a mass of
solid?
O A. Grams solid x mol/g < 1/AHfusion
B. Grams solid x mol/g < AHfusion
C. Grams solid x g/mol * A Hfusion
D. Grams solid g/mol < 1/AHfusion
Answer:
C I think from what I did to solve!!
Answer: Grams solid x mol/g x AHfusion
Explanation: